Confidence: Medium · Source: FCC ULS · As of 2026-09-11
K4MPH callsign genealogy
Currently held by Collier Jr, Gerald A
The FCC publishes a previous_call_sign on
every amateur license — a self-link to the licensee's prior callsign.
Following those links produces the chain below.
Previous callsigns
Older callsigns held by K4MPH's current licensee, walking backwards.
- PEACOCK, FRANCIS BTNgranted 2015-08-14cancelled 2017-08-18
Successor callsigns
Callsigns held now by people who previously held K4MPH.
- Collier Jr, Gerald ATNgranted 2025-05-23
All historical holders
Every license row we've seen with the callsign K4MPH, oldest first.
- Collier Jr, Gerald A TN2011-02-05 → cancelled 2015-06-02
- PEACOCK, FRANCIS B TN2017-08-18 active